Hello,
I'm working with the NUCLEO-H7S3L8 microcontroller and trying to transmit data using SPI, but I'm encountering an issue where the TXDR (Transmit Data Register) is not updating.
I have generated the code using STM32CubeIDE Version: 1.17.0 and SDK version STM32Cube_FW_H7RS_V1.1.0, keeping most of the settings default.
SPI Configuration (via STM32CubeIDE GUI):
- Configured SPI in full-duplex master mode.
- Set data size to 8-bit.
- Adjusted the prescaler for 75 Mbit/s (currently, speed does not seem to affect the issue).
- Connected the MISO pin to the MOSI pin (PA6 <---> PB5) using a jumper. (Loopback Test)
Issue:
- SPI communication does not seem to initiate.
Debugging Observations:
- Execution gets stuck in the HAL_SPI_TransmitReceive function when using the HAL_MAX_DELAY macro.
- TXDR register remains unchanged when writing data.
Questions:
- Why is the TXDR register not updating when writing data?
- Are there any specific settings required for the SPI peripheral in the NUCLEO-H7S3L8 series?
- Could this be related to clock configuration or a missing initialization step?
- Is there a required sequence for enabling SPI transmission that I might be missing?
I would appreciate any insights or suggestions. Thanks in advance!
